By telling him
Be ther for yjur friend let her/him know that ypu love him and you are in this together
well it depends do you love this person as a friend or more than a friend? as a friend -> (loving friendship) more than a friend -> (let then know that you want to be more than friends and that you love them!)
dont pressure her into doing it she will let you know
I wouldnt say love right away as it can scare them, definetly let them know that you care for them, if they were truly your best friend they will love you back or at least continue to be your best friend :)
Let the lovers love
let them know cause you only live once and they should know how you really feel
You don't you let them work it out by themselves.
just go a head and let your friend know thta you love the guy that she does
Tell them what your feeling about that person and let them know that your trying to help them not hurt them.
All you have to do is be yourself. Love your man, let him know you love him, & be cool. That's all there really is to it. Hope this helps!
I am in the same situation. I love my best freind ♥ I told him and know where stronger freinds, I think you should let him/her know :) If he/she is really your best friend they will understand how you feel, and won't mess up your relation ship
very carefully :)